CN218471798U

CN218471798U - Permanent magnet arc extinguishing device of relay

Info

Publication number: CN218471798U
Application number: CN202222700035.9U
Authority: CN
Inventors: 廖继军; 文静; 郑树彬; 柴晓冬; 彭乐乐; 钟倩文
Original assignee: Shanghai University of Engineering Science
Current assignee: Shanghai University of Engineering Science
Priority date: 2022-10-13
Filing date: 2022-10-13
Publication date: 2023-02-10
Anticipated expiration: 2032-10-13

Abstract

The utility model relates to a permanent magnetic arc-extinguishing device of a relay, which comprises an upper shell and a lower shell which are designed in a split type; the upper shell and the lower shell are connected through a fastener; the top end of the upper shell is provided with a heat dissipation port, an arc extinguishing chamber is arranged in the upper shell, the back surface of the upper shell is provided with an arc extinguishing grid plate, and the bottom of the upper shell is provided with a partition plate used for being separated from the lower shell; the arc extinguish chamber is connected with the top of the inner side of the upper shell through a fixing piece at the top; one end of the clapboard is provided with a static contact, and the other end is provided with a moving contact; a permanent magnet block is arranged between the static contact and the moving contact; the permanent magnet blocks are connected with the partition plate through mounting grooves arranged on the permanent magnet blocks; a heat radiation fan used for heat radiation during permanent magnet arc extinguishing is arranged in the lower shell; and an air inlet is formed in the bottom of the lower shell. Compared with the prior art, the utility model has the advantages of the radiating effect is good, the arc extinguishing effect is good, cost of maintenance is low.

Description

Permanent magnet arc extinguishing device of relay

Technical Field

The utility model relates to a permanent magnetism arc control device especially relates to a permanent magnetism arc control device of relay.

Background

When the power supply voltage exceeds tens of volts and the breaking current is more than tens of amperes, measures for enhancing the arc extinguishing capability are generally required to reduce the burning loss of the arc to the contact and to limit the space for the arc to spread.

Chinese patent CN111180229A discloses an arc-extinguishing device, which improves arc-extinguishing capability by arranging a grid arc-extinguishing chamber in a limited space on the basis of the existing magnetic quenching; the cooling of the electric arc is further enhanced by utilizing the arc extinguishing cavities at the upper part and the lower part of the contactor and the metal cup, the pollution of a main cavity body is avoided, and the arc extinguishing capability is further improved; high-temperature gas generated between the moving contact and the fixed contact on the two sides of the contact bridge flows in respective gas flow channels, so that the high-temperature arcing gas effectively flows and is circularly cooled.

However, this arc control device when using, still can't carry out quick heat dissipation to the heat that the during operation produced in the casing, leads to life weak, and secondly general magnetic field intensity is weak, is unfavorable for the arc extinguishing, and current arc control device adopts the integral type design in addition, when taking place to damage, needs wholly to change, leads to cost of maintenance high.

Therefore, how to design and realize a permanent magnetism arc control device that the heat dissipation is fast, the arc extinguishing is effectual, cost of maintenance is low becomes the technical problem that needs to solve.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a permanent magnetism arc control device of relay in order to overcome the defect that above-mentioned prior art exists.

The purpose of the utility model can be realized by the following technical proposal:

a permanent magnetic arc-extinguishing device of a relay comprises an upper shell and a lower shell which are designed in a split mode; the upper shell and the lower shell are connected through a fastener; the top end of the upper shell is provided with a heat dissipation port, an arc extinguishing chamber is arranged in the upper shell, the back surface of the upper shell is provided with an arc extinguishing grid plate, and the bottom of the upper shell is provided with a partition plate used for being separated from the lower shell; the arc extinguish chamber is connected with the top of the inner side of the upper shell through a fixing piece at the top; one end of the clapboard is provided with a static contact, and the other end of the clapboard is provided with a movable contact; a permanent magnet block is arranged between the static contact and the moving contact; the permanent magnet blocks are connected with the partition plate through mounting grooves arranged on the permanent magnet blocks; a heat radiation fan used for heat radiation during permanent magnet arc extinguishing is arranged in the lower shell; and an air inlet is formed in the bottom of the lower shell.

Further, the fastener comprises a fastening bolt and a nut.

Furthermore, a moisture-proof layer for moisture prevention is arranged between the upper shell and the arc extinguish chamber.

Furthermore, an opening right opposite to the arc extinguishing grid plate is formed in the back surface of the upper shell; the opening is arranged in the middle of the back surface of the upper shell.

Furthermore, the number of the fixing pieces is two, and the fixing pieces are symmetrically distributed on the top of the arc extinguish chamber.

Furthermore, a ventilation opening for air circulation is arranged in the middle of the partition plate.

Furthermore, the number of the heat radiation fans is two, and the two heat radiation fans are symmetrically distributed in the lower shell.

Furthermore, the number of the air inlets is two, and the two air inlets are respectively arranged below the two cooling fans.

Furthermore, the two air inlets are internally provided with dust screens in the horizontal direction.

Furthermore, connecting columns are arranged on two sides of the bottom of the lower shell; the lower ends of the two connecting columns are provided with fixing blocks for fixedly supporting the device.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model discloses a set up radiator fan, dust screen, air intake, vent and thermovent, utilize the mutually supporting effect between them to the realization is dispelled the heat fast to the heat that the interior permanent magnetism arc extinguishing during operation of upper casing produced, has prolonged the life of device.

2. The utility model discloses a setting of explosion chamber can strengthen magnetic field intensity, makes the arc extinguishing effect better.

3. The utility model discloses a go up casing and the split type design of casing down, when wherein go up casing or casing damage down, only need to change the damage part that corresponds, need not wholly to change, reduced cost of maintenance.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the upper and lower housings of the present invention;

FIG. 3 is a schematic top view of the partition board of the present invention;

fig. 4 is a structural schematic diagram of the upper housing of the present invention.

The numbers in the figures indicate:

1. the device comprises an upper shell, 2, a lower shell, 3, a connecting column, 4, a heat dissipation port, 5, a moisture-proof layer, 6, an arc extinguishing chamber, 7, a fixing piece, 8, a fastening bolt, 9, a nut, 10, an arc extinguishing grid piece, 11, a dustproof net, 12, an air inlet, 13, a heat dissipation fan, 14, a ventilation opening, 15, a partition board, 16, a static contact, 17, a moving contact, 18, a mounting groove, 19 and a permanent magnet.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments. The embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.

Examples

As shown in fig. 1 and 2, a permanent magnetic arc extinguishing device for a relay includes an upper housing 1 and a lower housing 2; the left end and the right end of the upper shell 1 are connected with the lower shell 2 through fasteners, the upper shell 1 and the lower shell 2 are designed in a split mode, when the upper shell 1 or the lower shell 2 is damaged, only corresponding damaged parts need to be replaced, integral replacement is not needed, and maintenance cost is reduced; the fastener comprises a fastening bolt 8 and a nut 9; the upper end of the upper shell 1 is provided with a heat dissipation port 4, the inner surface of the upper shell 1 is provided with a moisture-proof layer 5, the inner side wall of the moisture-proof layer 5 is provided with an arc extinguishing chamber 6, and the arc extinguishing chamber 6 is arranged to strengthen the magnetic field intensity and is beneficial to arc extinguishing; the fixing pieces 7 at the top of the arc extinguish chamber 6 are connected with the top of the inner side of the upper shell 1, and the number of the fixing pieces 7 is two and is arranged in a left-right axial symmetry mode relative to the upper shell 1; the back of the upper shell 1 is provided with arc extinguishing grid pieces 10; an opening is formed in the middle of the back of the upper shell 1, and the opening is right opposite to the arc extinguishing grid piece 10; a partition plate 15 is arranged near the bottom end inside the upper shell 1; one end of the clapboard 15 is provided with a static contact 16, and the other end is provided with a moving contact 17; a permanent magnet 19 is arranged between the static contact 16 and the moving contact 17; the permanent magnet 19 is connected with the partition board 15; an air inlet 12 is formed in the middle of the bottom of the lower shell 2; the number of the air inlets 12 is two, the two air inlets 12 are arranged in a left-right axial symmetry manner relative to the lower shell 2, and the interior of the two air inlets 12 is horizontally provided with a dust screen 11; a heat radiation fan 13 is arranged in the lower shell 2; the number of the heat dissipation fans 13 is two, and the two heat dissipation fans 13 are arranged in a left-right axial symmetry manner relative to the lower shell 2 and correspond to the two air inlets 12; lower casing 2's bottom both sides all be connected with spliced pole 3, the fixed block is all installed to the lower extreme of two spliced poles 3 for carry out the fixed stay to the device.

As shown in fig. 3, a grid-shaped ventilation opening 14 is opened in the middle of the partition 15 for ventilation between the upper casing 1 and the lower casing 2. By utilizing the mutual matching action among the cooling fan 13, the dust screen 11, the air inlet 12, the vent 14 and the heat dissipation port 4, the heat generated in the upper shell 1 during working can be quickly dissipated, and the service life is prolonged.

As shown in fig. 4, one side of the permanent magnet 19 is provided with an installation groove 18; the permanent magnet blocks 19 are connected with the upper surface of the partition board 15 through the mounting grooves 18.

When the utility model works, the permanent magnet block 19 has a fixed magnetic pole, the arc extinguishing direction can be determined, when the moving contact 17 and the static contact 16 are disconnected, due to the direct current, the electric arc generated between the moving contact 17 and the static contact 16 is rapidly elongated and extinguished under the action of the constant permanent magnetic field generated by the permanent magnet block 19 and the electric force generated by the contact current; when heat dissipation is needed, two heat dissipation fans 13 are started and heat generated during operation in the upper shell 1 is discharged from the heat dissipation port 4 through the ventilation port 14 on the partition plate 15; when needs maintenance change, then pull down the fastening bolt 8 and the nut 9 at casing 1 and casing 2 both ends down, then change corresponding last casing 1 or casing 2 damage part down can, then carry out fixed mounting through fastening bolt 8 and nut 9 again, dampproof course 5 can play good dampproofing effect.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by logical analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention by those skilled in the art should be within the scope of protection defined by the claims.

Claims

1. A permanent magnetic arc extinguishing device of a relay is characterized by comprising an upper shell (1) and a lower shell (2) which are designed in a split mode; the upper shell (1) and the lower shell (2) are connected through a fastener; the top end of the upper shell (1) is provided with a heat dissipation port (4), the interior of the upper shell is provided with an arc extinguishing chamber (6), the back surface of the upper shell is provided with an arc extinguishing grid sheet (10), and the bottom of the upper shell is provided with a partition plate (15) used for being separated from the lower shell (2); the arc extinguish chamber (6) is connected with the top of the inner side of the upper shell (1) through a fixing piece (7) at the top; one end of the clapboard (15) is provided with a static contact (16), and the other end is provided with a movable contact (17); a permanent magnet block (19) is arranged between the static contact (16) and the movable contact (17); the permanent magnet blocks (19) are connected with the partition board (15) through mounting grooves (18) arranged on the permanent magnet blocks (19); a heat radiation fan (13) for heat radiation during permanent magnet arc extinguishing is arranged in the lower shell (2); and an air inlet (12) is formed in the bottom of the lower shell (2).

2. A permanent magnetic arc extinguishing device of a relay according to claim 1, characterized in that the fastening member comprises a fastening bolt (8) and a nut (9).

3. A permanent magnetic arc-extinguishing device for a relay according to claim 1, characterized in that a moisture-proof layer (5) is provided between the upper housing (1) and the arc-extinguishing chamber (6) for moisture-proof.

4. The permanent magnetic arc extinguishing device of the relay according to claim 1, characterized in that the back of the upper housing (1) is further provided with an opening opposite to the arc extinguishing grid (10); the opening is arranged in the middle of the back surface of the upper shell (1).

5. The permanent magnetic arc extinguishing device of the relay according to claim 1, characterized in that the number of the fixing pieces (7) is two, and the two fixing pieces are symmetrically distributed on the top of the arc extinguishing chamber (6).

6. A permanent magnetic arc extinguishing device of a relay according to claim 1, characterized in that a ventilation opening (14) for air circulation is provided in the middle of the partition (15).

7. The permanent magnetic arc extinguishing device of the relay according to claim 1, characterized in that the number of the heat dissipation fans (13) is two, and the two heat dissipation fans are symmetrically distributed inside the lower shell (2).

8. The permanent magnetic arc extinguishing device of a relay according to claim 7, characterized in that the number of the air inlets (12) is two, and the air inlets are respectively arranged below the two heat dissipation fans (13).

9. The permanent magnetic arc extinguishing device of the relay according to claim 8, characterized in that a horizontal dust screen (11) is disposed inside each of the two air inlets (12).

10. The permanent magnetic arc extinguishing device of the relay according to claim 1, characterized in that the two sides of the bottom of the lower housing (2) are provided with connecting columns (3); the lower ends of the two connecting columns (3) are provided with fixing blocks for fixedly supporting the device.